add xenomai

hc

2024-11-01 2f529f9b558ca1c1bd74be7437a84e4711743404

 kernel/include/linux/clocksource.h
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@@ -13,12 +13,15 @@
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 #include <linux/timex.h>
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 #include <linux/time.h>
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 #include <linux/list.h>
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+#include <linux/hashtable.h>
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 #include <linux/cache.h>
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 #include <linux/timer.h>
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+#include <linux/cdev.h>
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 #include <linux/init.h>
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 #include <linux/of.h>
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 #include <asm/div64.h>
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 #include <asm/io.h>
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+#include <uapi/linux/clocksource.h>
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 struct clocksource;
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 struct module;
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@@ -28,7 +31,14 @@
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 #include <asm/clocksource.h>
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 #endif
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+
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 #include <vdso/clocksource.h>
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+
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+enum clocksource_vdso_type {
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+	CLOCKSOURCE_VDSO_NONE = 0,
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+	CLOCKSOURCE_VDSO_ARCHITECTED,
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+	CLOCKSOURCE_VDSO_MMIO,	/* <= Must be last. */
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+};
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 /**
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  * struct clocksource - hardware abstraction for a free running counter
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@@ -101,6 +111,7 @@
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 	struct list_head	list;
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 	int			rating;
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 	enum vdso_clock_mode	vdso_clock_mode;
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+  	enum clocksource_vdso_type vdso_type;
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 	unsigned long		flags;
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 	int			(*enable)(struct clocksource *cs);
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@@ -118,6 +129,36 @@
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 	u64			wd_last;
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 #endif
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 	struct module		*owner;
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+};
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+
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+struct clocksource_mmio {
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+	void __iomem *reg;
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+	struct clocksource clksrc;
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+};
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+
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+struct clocksource_user_mmio {
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+	struct clocksource_mmio mmio;
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+	void __iomem *reg_upper;
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+	unsigned int bits_lower;
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+	unsigned int mask_lower;
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+	unsigned int mask_upper;
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+	enum clksrc_user_mmio_type type;
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+	unsigned long phys_lower;
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+	unsigned long phys_upper;
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+	unsigned int id;
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+	struct device *dev;
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+	struct cdev cdev;
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+	DECLARE_HASHTABLE(mappings, 10);
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+	struct spinlock lock;
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+	struct list_head link;
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+};
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+
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+struct clocksource_mmio_regs {
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+	void __iomem *reg_upper;
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+	void __iomem *reg_lower;
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+	unsigned int bits_upper;
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+	unsigned int bits_lower;
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+	unsigned long (*revmap)(void *);
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 };
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 /*
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@@ -264,10 +305,21 @@
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 extern u64 clocksource_mmio_readl_down(struct clocksource *);
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 extern u64 clocksource_mmio_readw_up(struct clocksource *);
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 extern u64 clocksource_mmio_readw_down(struct clocksource *);
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+extern u64 clocksource_dual_mmio_readw_up(struct clocksource *);
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+extern u64 clocksource_dual_mmio_readl_up(struct clocksource *);
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 extern int clocksource_mmio_init(void __iomem *, const char *,
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 	unsigned long, int, unsigned, u64 (*)(struct clocksource *));
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+extern int clocksource_user_mmio_init(struct clocksource_user_mmio *ucs,
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+				      const struct clocksource_mmio_regs *regs,
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+				      unsigned long hz);
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+
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+extern int clocksource_user_single_mmio_init(
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+	void __iomem *base, const char *name,
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+	unsigned long hz, int rating, unsigned int bits,
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+	u64 (*read)(struct clocksource *));
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+
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 extern int clocksource_i8253_init(void);
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 #define TIMER_OF_DECLARE(name, compat, fn) \